2 * Framebuffer device helper routines
4 * Copyright (c) 2009 CodeSourcery
7 * This code is licensed under the GNU GPLv2.
11 - Do something similar for framebuffers with local ram
12 - Handle rotation here instead of hacking dest_pitch
13 - Use common pixel conversion routines instead of per-device drawfn
14 - Remove all DisplayState knowledge from devices.
19 #include "framebuffer.h"
21 /* Render an image from a shared memory framebuffer. */
23 void framebuffer_update_display(
25 target_phys_addr_t base,
26 int cols, /* Width in pixels. */
27 int rows, /* Leight in pixels. */
28 int src_width, /* Length of source line, in bytes. */
29 int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */
30 int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */
31 int invalidate, /* nonzero to redraw the whole image. */
34 int *first_row, /* Input and output. */
35 int *last_row /* Output only */)
37 target_phys_addr_t src_len;
50 src_len = src_width * rows;
52 cpu_physical_sync_dirty_bitmap(base, base + src_len);
53 pd = cpu_get_physical_page_desc(base);
54 pd2 = cpu_get_physical_page_desc(base + src_len - 1);
55 /* We should reall check that this is a continuous ram region.
56 Instead we just check that the first and last pages are
57 both ram, and the right distance apart. */
58 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM
59 || (pd2 & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
62 pd = (pd & TARGET_PAGE_MASK) + (base & ~TARGET_PAGE_MASK);
63 if (((pd + src_len - 1) & TARGET_PAGE_MASK) != (pd2 & TARGET_PAGE_MASK)) {
67 src_base = cpu_physical_memory_map(base, &src_len, 0);
68 /* If we can't map the framebuffer then bail. We could try harder,
69 but it's not really worth it as dirty flag tracking will probably
70 already have failed above. */
73 if (src_len != src_width * rows) {
74 cpu_physical_memory_unmap(src_base, src_len, 0, 0);
78 dest = ds_get_data(ds);
79 if (dest_col_pitch < 0)
80 dest -= dest_col_pitch * (cols - 1);
81 if (dest_row_pitch < 0) {
82 dest -= dest_row_pitch * (rows - 1);
87 addr += i * src_width;
89 dest += i * dest_row_pitch;
91 for (; i < rows; i++) {
92 target_phys_addr_t dirty_offset;
95 while (addr + dirty_offset < TARGET_PAGE_ALIGN(addr + src_width)) {
96 dirty |= cpu_physical_memory_get_dirty(addr + dirty_offset,
98 dirty_offset += TARGET_PAGE_SIZE;
101 if (dirty || invalidate) {
102 fn(opaque, dest, src, cols, dest_col_pitch);
109 dest += dest_row_pitch;
111 cpu_physical_memory_unmap(src_base, src_len, 0, 0);
115 cpu_physical_memory_reset_dirty(pd, pd + src_len, VGA_DIRTY_FLAG);